1. T.S. Kuhn, The Structure of Scientific Revolutions (Chicago: University of Chicago Press, 1962);
2. for its use in geography, see R.J. Johnston, Geography and Geographers: Anglo American Geography Since 1945 (London: Edward Arnold, 1979).
3. H.E. Bracey, Social Provision in Rural Wiltshire (London: Methuen, 1952).
4. G.C. Dickinson, ‘The nature of rural population movement — an analysis of seven Yorkshire parishes based on electoral returns 1931–1954’, Yorkshire Bulletin of Economic and Social Research, vol 10 (1958) pp. 95–108.
5. See J.L. Newman, ‘The use of the term “hypothesis” in geography’, Annals of the Association of American Geographers, vol. 63 (1973) p. 23.